From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dennis Jacobfeuerborn Date: Mon, 24 Mar 2014 10:34:38 +0000 Subject: Re: Ghost traffic seen in all guest on a kvm hypervisor Message-Id: <53300A3E.5050900@conversis.de> List-Id: References: <532F9111.2050507@conversis.de> In-Reply-To: <532F9111.2050507@conversis.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Hi Remy, the only physical interface used is eth0 but I'm using vlans so the interface connected to the bridge is eth0.8 and all the guests are connected to this bridge as well. The output of ethtool -k for both eth0 and eth0.8 is: Offload parameters for eth0.8: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp-segmentation-offload: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: off large-receive-offload: off Regards, Dennis On 24.03.2014 07:00, Remy Mudingay wrote: > Hi Dennis, > > Please post the KVM bridge topology and also the output of ethtool -k ethX (for each real nic). > > Cheers, > > Remy > > > Sent from my Phone > >> On 24 Mar 2014, at 02:57, Dennis Jacobfeuerborn wrote: >> >> Hi, >> I have a problem on a kvm hypervisor that I cannot explain. It appears that some traffic shows up in the interface monitoring in all of the guests on that hypervisor. We are not using broadcasts in any way and I see peaks of 100mbit for several minutes on all of these systems. >> >> Does anybody have an idea what could cause this? >> >> Regards, >> Dennis >> -- >> To unsubscribe from this list: send the line "unsubscribe lartc" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html